CN110664243A - Over-twisting protection transmission mechanism, driving mechanism and electric kettle - Google Patents

Abstract

The invention discloses an over-twisting protection transmission mechanism, a driving mechanism and an electric kettle, and belongs to the field of household appliances. The excessive torsion protection transmission mechanism comprises: the first rotating part is provided with a circular groove which is coaxial with the first rotating part, and the inner circumferential surface of the circular groove is provided with a plurality of embedded grooves; the second rotating piece comprises a jogged convex piece, an elastic resetting piece and a rotating main body; the embedded convex part is provided with a convex part which can be embedded into the embedded groove; one side of the rotating main body is provided with a slideway for the embedded convex part to slide in a fitting manner; the elastic reset piece is positioned in the slideway and pushes out the embedded convex piece; after the convex part is embedded into the embedding groove, when the torsion between the first rotating piece and the second rotating piece is larger than the embedding force between the convex part and the embedding groove, the embedding convex part compresses the elastic resetting piece so that the convex part is separated from the embedding groove. Through first rotating member and second rotating member connection drive arrangement and follower transmission, can avoid too big torsion to be transmitted to drive arrangement by the follower, prevent to damage drive arrangement.

Description

Over-twisting protection transmission mechanism, driving mechanism and electric kettle

Technical Field

The invention relates to the technical field of household appliances, in particular to an over-torque protection transmission mechanism, a driving mechanism and an electric kettle.

Background

Along with the improvement of the living standard and the acceleration of the life rhythm of people, more and more household appliances enter the families of consumers to meet various different requirements of people, and the functions and application scenes of the household appliances are increasingly refined to improve the use experience of the consumers. For example, the electric kettle is provided with a water adding rotating arm, and the water adding rotating arm is driven by the rotation of the motor to add water to the kettle. In actual use, however, the consumer still has the problem of poor experience. For example, when the water adding rotating arm rotates, a barrier is touched (for example, a person pushes the water adding rotating arm by hand), the water adding rotating arm cannot rotate continuously due to the fact that the motor is blocked, and the service life of the motor is shortened and even the motor is burnt.

Disclosure of Invention

Based on the above, the invention provides the over-torsion protection transmission mechanism, the driving mechanism and the electric kettle, which can prevent the motor from being subjected to over-large torsion during rotation, avoid the motor from being burnt and prolong the service life of the motor.

The invention adopts the following technical scheme:

over-twisting protection transmission mechanism for connecting a driving device and a driven part comprises:

the first rotating part is used for connecting one of the connecting driving device and the driven part and is provided with a circular groove which is coaxial with the rotating axis of the first rotating part, the inner circumferential surface of the circular groove of the first rotating part is provided with a plurality of embedding grooves, and the embedding grooves are uniformly arranged in a ring around the axis;

the second rotating piece is used for connecting the other one of the connecting driving device and the driven piece and comprises a jogged convex piece, an elastic resetting piece and a rotating body which is coaxial with the circular groove, and the rotating body is accommodated in the circular groove and can rotate relative to the first rotating piece; the embedded convex part is provided with a convex part matched with the embedded groove; the rotating body is provided with a slideway for the embedded convex part to slide; the elastic resetting piece is positioned in the slide way and pushes out the embedded convex piece so that the convex part is embedded into the embedded groove; after the protruding part is embedded into the embedding groove, when the torsion between the first rotating piece and the second rotating piece is larger than the embedding force between the protruding part and the embedding groove, the embedding protruding part compresses the elastic resetting piece so that the protruding part is separated from the embedding groove.

In the transmission mechanism of the existing motor, the torque force applied to the tail end of the output shaft can be directly transmitted to the motor, when the torque force is too large, the motor cannot rotate to work, and the current passing through a motor coil generates a large amount of heat to shorten the service life of the motor and even burn the motor.

In the above over-twisting protection transmission mechanism, the first rotating element and the second rotating element may be respectively connected to a driving device (e.g. a motor) and a driven element for transmission, and the first rotating element and the second rotating element may synchronously rotate under the engagement action of the engagement convex element and the engagement concave groove; when the torque force applied between the first rotating element and the second rotating element by the driving device and the driven element is too large (namely, the driven element touches an obstacle), the embedded convex element of the second rotating element retracts to enable the convex part of the embedded convex element to be separated from the embedded groove, at the moment, the first rotating element and the second rotating element can rotate relatively, the elastic resetting element is separated again and then pushes the embedded convex element out to be abutted into the embedded groove, if the torque force is still larger than the embedded force at the moment, the embedded convex element retracts again to enable the convex part to be separated from the embedded groove, and the steps are repeated until the torque force is smaller than or equal to the embedded force. In the whole process, the first rotating piece and the driving device can always keep rotating, so that the phenomenon that the driving device stops rotating due to overlarge torque force to shorten the service life of the motor or even burn the motor is avoided.

In one embodiment, a limiting convex part is arranged at the outlet of the slide way, and the limiting convex part forms a limiting channel only allowing the convex part to extend out, so that the embedded convex part can be prevented from being separated from the slide way, and the embedded convex part is limited.

In one embodiment, the rotating body comprises a rotating upper cover and a rotating lower cover which is matched with the rotating upper cover and is fixed in a covering mode; the opposite surfaces of the rotary upper cover and the rotary lower cover are provided with grooves; after the rotary upper cover and the rotary lower cover are closed and fixed, the two grooves are combined to form the slideway. Rotatory upper cover and rotatory lower cover can be dismantled through the screw and connect fixedly, make things convenient for the case elasticity piece and the protruding piece of gomphosis that resets.

In one embodiment, a projection of the fitting groove on a vertical plane to the rotation axis is preferably arc-shaped or semicircular. The preferred arc or semicircular embedding groove is smooth, and the matched convex part can be conveniently slipped and separated when being subjected to larger torsion.

In one embodiment, the fitting groove is a hemispherical groove; the convex part is a hemisphere matched with the embedded groove. The assembly of the hemispherical groove and the hemispherical bulge is smooth, so that the embedded convex part is pushed back and the elastic reset part is compressed when the torsion is large.

In one embodiment, the rotating body and the first rotating member are each provided with an opening through which a water supply line passes.

The invention also discloses a driving mechanism, which comprises the over-torque protection transmission mechanism and further comprises:

the driving device is connected with the first rotating piece and drives the first rotating piece to rotate, or is connected with the rotating body and drives the rotating body to rotate; the drive means may be a motor;

and the fixed support is used for fixing the driving device and is provided with a cavity for the first rotating piece and the second rotating piece to rotate.

The driving mechanism adopts an over-torque protection transmission mechanism, so that the driving device connected with the input shaft can be prevented from being burnt due to over-large torque force.

In one embodiment, the fixed support comprises a fixed bracket for fixing the driving device, a support upper cover fixed by the fixed bracket and a support lower cover matched with the support upper cover and fixed by closing the support upper cover; the cavity is formed between the support upper cover and the support lower cover.

In one embodiment, the upper support cover and the lower support cover are detachably connected and fixed through a buckle, so that the first rotating piece and the second rotating piece are convenient to mount.

The invention also discloses an electric kettle, which comprises the driving mechanism and also comprises:

a kettle body;

a heating base having a kettle body heating part for heating the kettle body;

the water adding rotating arm comprises a water adding column arranged on the heating base and a rotating arm rotatably arranged at the upper end of the water adding column; the fixed support is fixed on the water adding column, and the rotation axis of the first rotating piece is coincided with the rotation axis of the rotating arm; one of the rotating main body and the first rotating piece which is not connected with the driving device is fixedly connected with the rotating arm;

the water adding pipeline extends into the rotary arm from the heating base through the water adding column and forms a water outlet at the tail end of the rotary arm;

and the control mainboard is respectively and electrically connected with the kettle body heating part, the driving device and the water adding pipeline.

In the electric kettle, the driving mechanism with the over-torsion protection transmission mechanism is adopted to realize the rotation of the water adding rotating arm, so that the phenomenon that the driving device is burnt down due to the fact that the water adding rotating arm touches a barrier when rotating can be avoided.

In one embodiment, the rotating body or the first rotating member has a plug portion for connecting with the rotating arm; the rotating arm is provided with a plug hole for the plug part to be inserted and fixed; the fixed support is provided with an avoiding groove for the insertion part to pass through and rotate around the rotation axis of the rotating main body. The connection between the rotating main body and the rotating arm is realized through the mode of the insertion part and the insertion hole.

In one embodiment, the electric kettle further comprises:

the in-place sensor is fixed on the water adding column at a position corresponding to the heating part of the kettle body; the in-place sensor is electrically connected with the control main board;

the trigger structure is arranged on the rotating arm and used for triggering the in-place sensor; when the water filling port is positioned above the heating part of the kettle body, the in-place sensor is triggered by the trigger structure. Through setting up the sensor that targets in place, can accurate control swinging boom stop the position of watering after rotating.

Compared with the prior art, the invention has the beneficial effects that:

in the over-torque protection transmission mechanism, a driving device (such as a motor) and a driven part can be connected through a first rotating part and a second rotating part for transmission, and the first rotating part and the second rotating part can synchronously rotate under the embedding action of the embedded convex part and the embedded groove; when the torque force applied between the first rotating part and the second rotating part by the driving device and the driven part is too large (namely, the driven part touches an obstacle), the embedded convex part of the second rotating part retracts to enable the convex part of the embedded convex part to be separated from the embedded groove, at the moment, the first rotating part and the second rotating part can rotate relatively, the first rotating part and the driving device can keep rotating all the time, and the phenomenon that the service life of the driving device is shortened and even the driving device is burnt due to the too large torque force is prevented.

The driving mechanism adopts the over-torque protection transmission mechanism, so that the driving device connected with the input shaft can be prevented from being burnt due to over-large torque.

The electric kettle provided by the invention adopts the driving mechanism to drive the rotating arm to add water, so that the phenomenon that the driving device is burnt down due to overlarge torsion caused by an obstacle when water is added can be avoided.

Drawings

The technology of the present invention will be described in further detail with reference to the accompanying drawings and detailed description below:

FIG. 1 is an exploded schematic view of the over-torque protection transmission of the present invention;

FIG. 2 is a cross-sectional side view of the over-torque protection transmission of the present invention;

FIG. 3 is a top cross-sectional view of the over-twist protection drive of the present invention;

FIG. 4 is an exploded schematic view of the drive mechanism of the present invention;

FIG. 5 is a cross-sectional side view of the drive mechanism of the present invention;

FIG. 6 is an exploded schematic view of the electric kettle of the present invention;

FIG. 7 is a cross-sectional view of the water adding tumbler of the electric kettle of the present invention as viewed from the side;

FIG. 8 is a sectional view of the water adding tumbler of the electric kettle of the present invention as viewed from above;

fig. 9 is a schematic diagram of the water adding rotating arm of the electric kettle of the invention in two working positions and a standby position.

Reference numerals:

1-over-twisting protection transmission mechanism; 11-a first rotating member; 111-circular groove; 112-a fitting groove; 12-a second rotating member; 121-a male engagement member; 1211-a projection; 122-a resilient return member; 123-a rotating body; 1231-a slide; 1232-a limit tab; 1233-a spacing channel; 1234-rotating the upper cover; 1235-rotating lower cover; 1236-grooving; 1237-a plug part;

2-a drive mechanism; 21-a drive device; 22-a fixed support; 221-a cavity; 222-a fixed support; 223-support upper cover; 224-seat lower cover; 225-buckling; 226-avoidance slot;

3-electric kettle; 31-pot body; 32-heating the base; 33-adding water rotating arm; 331-adding a water column; 332-a rotating arm; 333-plug hole; 34-a position sensor; 35-trigger structure, 36-disinfection container;

4-opening.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The over-torque protection transmission mechanism is used for connecting the driving device and the driven part and comprises a first rotating part and a second rotating part.

The first rotating part and the second rotating part are respectively used for connecting a driving device and a driven part, the first rotating part can be connected with the driving device, and the second rotating part is connected with the driven part; the first rotating member may be connected to the driving member and the second rotating member may be connected to the driven member.

The first rotating part is provided with a circular groove which is coaxial with the rotating axis of the first rotating part, the inner circumferential surface of the circular groove of the first rotating part is provided with a plurality of embedding grooves, and the embedding grooves are uniformly arranged in a ring around the axis;

the second rotating piece comprises a chimeric convex piece, an elastic resetting piece and a rotating body which is coaxial with the circular groove, and the rotating body is accommodated in the circular groove and can rotate relative to the first rotating piece; the embedded convex part is provided with a convex part matched with the embedded groove; a slideway for the fitting convex part to slide in a fitting manner is arranged in the radial direction of the surface of the rotating body opposite to the inner peripheral surface, which corresponds to the position of the fitting groove; the elastic reset piece is positioned in the slide way and pushes the embedded convex piece out so that the convex part exceeds the slide way and is embedded into the embedded groove. The elastic reset piece can be a pressure spring or a spring piece.

After the protruding part is embedded into the embedding groove, when the torsion between the first rotating piece and the second rotating piece is larger than the embedding force between the protruding part and the embedding groove, the embedding protruding part compresses the elastic resetting piece so that the protruding part is separated from the embedding groove.

In the above over-twisting protection transmission mechanism, the first rotating element and the second rotating element may be respectively connected to a driving device (e.g. a motor) and a driven element for transmission, and the first rotating element and the second rotating element may synchronously rotate under the engagement action of the engagement convex element and the engagement concave groove; when the torque force applied between the first rotating element and the second rotating element by the driving device and the driven element is too large (namely, the driven element touches an obstacle), the embedded convex element of the second rotating element retracts to enable the convex part of the embedded convex element to be separated from the embedded groove, at the moment, the first rotating element and the second rotating element can rotate relatively, the elastic resetting element is separated again and then pushes the embedded convex element out to be abutted into the embedded groove, if the torque force is still larger than the embedded force at the moment, the embedded convex element retracts again to enable the convex part to be separated from the embedded groove, and the steps are repeated until the torque force is smaller than or equal to the embedded force. In the whole process, the first rotating piece and the driving device can always keep rotating, the driving device is prevented from stopping rotating due to overlarge torque force, the service life of the driving device is prolonged, and the motor is prevented from being burnt.

Preferably, the engaging protrusions, the elastic restoring members and the slide ways may be provided with a plurality of sets, for example, 3 sets, i.e., 3 engaging members, 3 elastic restoring members and 3 slide ways.

Preferably, the exit of slide is equipped with spacing convex part, spacing convex part forms and only supplies the spacing passageway that the convex part stretches out can prevent that the protruding piece of gomphosis from deviating from the slide, plays limiting displacement to the protruding piece of gomphosis.

Specifically, the rotating body comprises a rotating upper cover and a rotating lower cover which is matched with the rotating upper cover and is fixedly covered; the opposite surfaces of the rotary upper cover and the rotary lower cover are provided with grooves; after the rotary upper cover and the rotary lower cover are closed and fixed, the two grooves are combined to form the slideway. Rotatory upper cover and rotatory lower cover can be dismantled through the screw and connect fixedly, make things convenient for the case elasticity piece and the protruding piece of gomphosis that resets.

Wherein the projection of the embedding groove on the vertical plane of the rotation axis is preferably arc-shaped or semicircular. The preferred arc or semicircular embedding groove is smooth, and the matched convex part can be conveniently slipped and separated when being subjected to larger torsion.

Specifically, the fitting groove is a hemispherical groove; the convex part is a hemisphere matched with the embedded groove. The assembly of the hemispherical groove and the hemispherical bulge is smooth, so that the embedded convex part is pushed back and the elastic reset part is compressed when the torsion is large.

Preferably, the rotating body and the first rotating member are provided with openings for the water feeding pipeline to pass through, each opening is an arc-shaped opening, and the axis of each opening is coaxial with the rotation axis of the first rotating member.

The invention also discloses a driving mechanism, which comprises the over-torque protection transmission mechanism and further comprises:

the driving device is connected with the first rotating piece and drives the first rotating piece to rotate, or is connected with the rotating body and drives the rotating body to rotate; the driving device can be a motor, and if the driving device is connected with the first rotating piece, the rotating body is connected with the driven piece; if the driving device is connected with the rotating body, the first rotating piece is connected with the driven piece;

and the fixed support is used for fixing the driving device and is provided with a cavity for the first rotating piece and the second rotating piece to rotate.

The driving mechanism adopts an over-torque protection transmission mechanism, so that the driving device connected with the input shaft can be prevented from being burnt due to over-large torque force.

Specifically, the fixed support comprises a fixed support for fixing the driving device, a support upper cover fixed by the fixed support and a support lower cover matched with the support upper cover and fixed in a covering manner; the cavity is formed between the support upper cover and the support lower cover.

Preferably, the support upper cover and the support lower cover are detachably connected and fixed through a buckle, and the first rotating piece and the second rotating piece are convenient to mount.

The invention also discloses an electric kettle, which comprises the driving mechanism and also comprises: the kettle body, the disinfection container, the heating base, the water adding rotating arm, the water adding pipeline and the control main board.

The heating base is provided with a kettle body heating part for heating the kettle body and a disinfection heating part for heating the disinfection container, wherein the kettle body heating part and the disinfection heating part are both provided with electric heaters, or the electric heaters are positioned at the bottom of the kettle body and the bottom of the disinfection container, and the kettle body heating part and the disinfection heating part are provided with corresponding power supply couplers.

The water adding rotating arm comprises a water adding column arranged on the heating base and a rotating arm rotatably arranged at the upper end of the water adding column; the fixed support is fixed on the water adding column, and the rotation axis of the first rotating piece is coincided with the rotation axis of the rotating arm; and one of the rotating main body and the first rotating piece, which is not connected with the driving device, is fixedly connected with the rotating arm.

The water feeding pipeline is formed by extending the heating base into the rotating arm through the water feeding column and forming a water outlet at the tail end of the rotating arm.

The control mainboard is respectively and electrically connected with the kettle body heating part, the driving device and the water adding pipeline and is used for controlling the heating of the heating base, the rotation of the rotating arm and the opening/closing of a valve of the water adding pipeline.

In the electric kettle, the driving mechanism with the over-torsion protection transmission mechanism is adopted to realize the rotation of the water adding rotating arm, so that the phenomenon that the driving device is burnt down due to the fact that the water adding rotating arm touches a barrier when rotating can be avoided.

Specifically, the rotating body or the first rotating member has an insertion part for connecting with the rotating arm; the rotating arm is provided with a plug hole for the plug part to be inserted and fixed; the fixed support is provided with an avoiding groove for the insertion part to penetrate through and rotate around the rotation axis of the rotating main body, and the avoiding groove is an arc-shaped groove and corresponds to the rotation path of the insertion part. Specifically, the plug connector is a plug pin extending out of the bottom of the rotating body, and the plug hole is a pin hole matched with the plug pin. The connection between the rotating main body and the rotating arm is realized through the mode of the insertion part and the insertion hole. The number of the bolts and the inserting holes can be one, two or even more than two, as long as the rotating main body and the rotating arm can synchronously rotate.

Preferably, the electric kettle further comprises:

two in-place sensors, each in-place sensor is respectively fixed on the water adding column corresponding to the positions of the kettle body heating part and the disinfection heating part; each in-place sensor is electrically connected with the control main board;

the trigger structure is arranged on the rotating arm and used for triggering the in-place sensor; when the water filling port is positioned above the heating part of the kettle body, the trigger structure triggers the in-place sensors. Through setting up the sensor that targets in place, can accurate control swinging boom stop the position of watering after rotating.

Specifically, the in-place sensor can be an infrared sensor and is provided with a transmitting end and a receiving end, and the transmitting end and the receiving end are arranged oppositely; the strip separation blade that stretches out on the swinging boom, trigger structure are the hole on the separation blade, and the separation blade is located between transmitting terminal and the receiving terminal at the rotation in-process, shelters from the light signal between transmitting terminal and the receiving terminal, and between the hole transfer transmitting terminal and the receiving terminal, do not have between transmitting terminal and the receiving terminal and shelter from, and then trigger the information that targets in place.

When the water-adding device is used, two positions of the rotating arm, which are used for adding water, at the positions of the disinfecting heating part and the kettle body heating part respectively are working positions, the position between the disinfecting heating part and the kettle body heating part is a standby position, and an included angle between the two working positions and the rotating axis of the rotating arm is 144 degrees. After water is added, the valve is closed, the main board is controlled to control the driving device to start and rotate for a few seconds, so that the rotating arm approximately returns to a standby position between two working positions, and the water is not needed to be injected during standby, the position precision of the rotating arm is not needed to be considered, and the rotating arm is controlled only by the rotating time of the rotating arm; and position accuracy is required to be controlled when the working positions are located, so that water injection deviation is prevented, and in-place sensors are correspondingly arranged at the two working positions.

Example 1

The over-torque protection transmission mechanism 1 is used for connecting a driving device and a driven part and comprises a first rotating part 11 and a second rotating part 12. The first and second rotating members 11 and 12 are used to connect the driving device 21 and the driven member, respectively.

The first rotating member 11 is provided with a circular groove 111 which is coaxial with the rotation axis of the first rotating member 11, the inner circumferential surface of the circular groove of the first rotating member 11 is provided with a plurality of embedding grooves 112, and the embedding grooves 112 are uniformly arranged in a circle around the axis;

the second rotating member 12 includes a fitting protrusion 121, an elastic restoring member 122, and a rotating body 123 coaxial with the circular groove 111, and the rotating body 123 is accommodated in the circular groove 111 and can rotate relative to the first rotating member 11; the fitting protrusion 121 has a projection 1211 that can be fitted into the fitting groove 112, i.e., the projection 1211 has a shape matching the fitting groove 112. A slide way 1231 for the fitting and sliding of the fitting convex part 121 is radially arranged at a position of the surface of the rotating body 123 opposite to the inner peripheral surface, which corresponds to the fitting groove 112; the elastic restoring member 122 is located in the sliding way 1231 and pushes out the engaging convex member 121, so that the protruding portion 1211 exceeds the sliding way 1231 and is engaged with the engaging groove 112. The elastic restoring member 122 may be a compression spring or a spring plate.

After the protrusion 1211 is fitted into the fitting groove 112, when the torsion between the first rotating member 11 and the second rotating member 12 is greater than the fitting force between the protrusion 1211 and the fitting groove 112, the fitting protrusion 121 compresses the elastic restoring member 122 to disengage the protrusion 1211 from the fitting groove 112.

In the above-mentioned over-twisting protection transmission mechanism 1, the first rotating member 11 and the second rotating member 12 can be respectively connected with the driving device 21 (such as a motor) and the driven member for transmission, and the first rotating member 11 and the second rotating member 12 can synchronously rotate under the engagement action of the engagement convex member 121 and the engagement concave groove 112; when the torque force applied between the first rotating member 11 and the second rotating member 12 by the driving device 21 and the driven member is too large (i.e. the driven member touches an obstacle), the engaging protrusion 121 of the second rotating member 12 retracts to disengage the protrusion 1211 of the engaging protrusion 121 from the engaging groove 112, at this time, the first rotating member 11 and the second rotating member 12 can rotate relatively, and the elastic restoring member 122 disengages again and then pushes out the engaging protrusion 121 to abut into the engaging groove 112, if the torque force is still greater than the engaging force at this time, the engaging protrusion 121 retracts again to disengage the protrusion 1211 from the engaging groove 112, and the process is repeated until the torque force is less than or equal to the engaging force. In the whole process, the first rotating member 11 and the driving device 21 can always keep rotating, so that the driving device 21 is prevented from stopping rotating and being burnt due to excessive torsion.

The engaging protrusion 121, the elastic restoring member 122 and the sliding ways 1231 may be provided with a plurality of sets, for example, 3 sets, that is, 3 engaging members, 3 elastic restoring members 122 and 3 sliding ways 1231.

The outlet of the slide way 1231 is provided with a limit convex part 1232, the limit convex part 1232 forms a limit channel 1233 for the protrusion 1211 to extend out, so that the convex fitting 121 can be prevented from being separated from the slide way 1231, and the limit function is realized on the convex fitting 121. The fitting protrusion 121 is a cylinder, and the protrusion 1211 is disposed at one end of the cylinder and is coaxially disposed. The slide 1231 is a circular hole, the diameter of which matches with the diameter of the fitting convex part 121; the stopper passage 1233 is also a circular hole and has a diameter smaller than that of the fitting projection 121.

Specifically, the rotating body 123 includes a rotating upper cover 1234 and a rotating lower cover 1235 fitted and fixed to the rotating upper cover 1234; the opposite surfaces of the rotary upper cover 1234 and the rotary lower cover 1235 are provided with a slot 1236; after the upper rotating cover 1234 and the lower rotating cover 1235 are closed and fixed, the two slots 1236 are combined to form the slideway 1231. The upper rotating cover 1234 and the lower rotating cover 1235 may be detachably connected and fixed by screws, facilitating the elastic restoring member 122 of the case and the engaging protrusion 121.

Wherein, the projection of the embedding groove 112 on the vertical plane of the rotation axis is preferably arc-shaped or semicircular. The arc or semi-circular fitting groove 122 is smooth, so that the protrusion 1211 can be easily slid and separated when being subjected to a large torque.

Specifically, the fitting groove 112 is a hemispherical groove; the protrusion 1211 is a hemisphere fitted into the fitting groove 112. The assembly of the hemispherical recess and the hemispherical protrusion 1211 is smooth, which facilitates pushing the engaging protrusion 121 back and compressing the elastic restoring member 122 when the torque is large.

The rotating main body 123 and the first rotating member 11 are both provided with openings 4 for water feeding pipelines to pass through, each opening 4 is an arc-shaped opening, and the axis of each opening 4 is coaxial with the rotation axis of the first rotating member, so that the design of the electric kettle is designed, and the water feeding pipelines of the electric kettle are convenient to install.

Example 2

The driving mechanism 2 comprises the over-twisting protection transmission mechanism 1 of the embodiment 1, and further comprises a driving device 21 and a fixed support 22.

Wherein, the driving device 21 is connected with the first rotating member 11 and drives the first rotating member 11 to rotate; the drive means 21 may be a motor;

the fixing support 22 is used for fixing the driving device 21, and has a cavity 221 for the first rotating member 11 and the second rotating member 12 to rotate.

The driving mechanism 2 adopts the over-torque protection transmission mechanism 1, so that the driving device 21 connected with the input shaft can be prevented from being burnt due to over-large torque force.

Specifically, the fixed support 22 includes a fixed bracket 222 for fixing the driving device 21, a support upper cover 223 fixed to the fixed bracket 222, and a support lower cover 224 fitted and fixed to the support upper cover 223; the cavity 221 is formed between the holder upper cover 223 and the holder lower cover 224.

The upper support cover 223 and the lower support cover 224 are detachably connected and fixed through a buckle 225, so that the first rotating member 11 and the second rotating member 12 are conveniently installed.

The upper support cover 223 and the lower support cover 224 are also correspondingly provided with openings 4 for the water feeding pipeline to pass through, each opening 4 is an arc-shaped opening, and the axis of each opening 4 is coaxial with the rotation axis of the first rotating member, so that the design of the electric kettle is designed, and the water feeding pipeline of the electric kettle is convenient to install.

Example 3

The electric kettle 3, including the drive mechanism 2 of embodiment 2, further includes: a kettle body 31, a disinfection container 36, a heating base 32, a water adding rotating arm 33, a water adding pipeline and a control main board.

The heating base 32 has a kettle heating portion for heating the kettle 31 and a disinfection heating portion for heating the disinfection container 36, and it can be understood that both the kettle heating portion and the disinfection heating portion are provided with electric heaters, or the electric heaters are located at the bottom of the kettle 31 and the bottom of the disinfection container 36, and the kettle heating portion and the disinfection heating portion are provided with corresponding power supply couplers.

The water adding rotating arm 33 comprises a water adding column 331 arranged on the heating base 32 and a rotating arm 332 rotatably arranged at the upper end of the water adding column 331; the rotating arm 332 is a transmission member connected to the second rotating member 12; the fixing support 22 is fixed on the water feeding column 331, the rotation axis of the first rotating member 11 coincides with the rotation axis of the rotating arm 332, and the rotating main body 123 is fixedly connected with the rotating arm 332.

The water feeding pipe is routed from the heating base 32 through the water feeding column 331, passes through each opening 4 and extends into the rotating arm 332 and forms a water outlet at the end of the rotating arm 332.

The control mainboard is respectively and electrically connected with the kettle body heating part, the driving device 21 and the water adding pipeline and is used for controlling the heating of the heating base 32, the rotation of the rotating arm 332 and the opening/closing of a water adding pipeline valve.

In the electric kettle 3, the driving mechanism 2 with the over-twisting protection transmission mechanism is adopted to realize the rotation of the water adding rotating arm 33, so that the phenomenon that the driving device 21 is burnt out due to the fact that the water adding rotating arm 33 touches an obstacle when rotating can be avoided.

Specifically, the rotating body further has a socket 1237 for connecting with the rotating arm 332; the rotating arm 332 has a plug hole 333 for inserting and fixing the plug part 1237; the fixing support 22 is provided with an avoiding groove 226 for the insertion part 1237 to pass through and rotate around the rotation axis of the rotating body, and the avoiding groove 226 is an arc-shaped groove corresponding to the rotation path of the insertion part 1237. Specifically, the plug is a pin protruding from the bottom of the rotating body, and the insertion hole 333 is a pin hole matching with the pin. The connection of the rotating body and the rotating arm 332 is achieved by means of the insertion part 1237 and the insertion hole 333.

The electric kettle 3 further comprises a two-to-one position sensor 334 and a trigger structure 35.

Wherein, each in-place sensor 334 is fixed on the water adding column 331 respectively corresponding to the positions of the kettle body heating part and the disinfection heating part; each in-place sensor 334 is electrically connected with the control mainboard;

the trigger structure 35 is arranged on the rotating arm 332 for triggering the in-place sensor 334; when the water filling port is positioned above the kettle body heating part, the triggering structure 35 triggers each in-place sensor 334. By providing the in-place sensor 334, the position at which the water addition is stopped after the rotation of the rotating arm 332 can be precisely controlled.

Specifically, the in-place sensor 334 may be an infrared sensor, and has a transmitting end and a receiving end, and the transmitting end and the receiving end are arranged oppositely; the strip separation blade that stretches out on the swinging boom 332, trigger structure 35 are the hole on the separation blade, and the separation blade is located between transmitting terminal and the receiving terminal at the rotation in-process, shelters from the light signal between transmitting terminal and the receiving terminal, and between the hole transfer transmitting terminal and the receiving terminal, there is not sheltering from between transmitting terminal and the receiving terminal, and then triggers the information that targets in place.

When the water-adding kettle is used, the two positions of the rotating arm 332 for adding water at the positions of the disinfecting heating part and the kettle body heating part are working positions respectively, the position between the disinfecting heating part and the kettle body heating part is a standby position, and an included angle between the two working positions and the rotating axis of the rotating arm 332 is 144 degrees. After water is added, the valve is closed, the main board is controlled to control the driving device 21 to start and rotate for a few seconds, so that the rotating arm 332 approximately returns to a standby position between two working positions, and the water is not needed to be injected during standby, the position precision of the rotating arm is not needed to be considered, and the rotating arm is controlled only by the rotating time of the rotating arm; and position accuracy is required to be controlled in the working positions to prevent water injection deviation, so that the in-position sensors 334 are correspondingly arranged in the two working positions.

Other contents of the over-torque protection transmission mechanism, the driving mechanism and the electric kettle are referred to the prior art and are not described herein again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims (12)

1. Over-twisting protection transmission mechanism for connecting driving device and driven part, which is characterized by comprising:

the first rotating piece is used for connecting one of the connecting driving device and the driven piece and is provided with a circular groove which is coaxial with the rotating axis of the first rotating piece, the inner circumferential surface of the circular groove of the first rotating piece is provided with a plurality of embedding grooves, and the embedding grooves are uniformly arranged around the axis;

the second rotating piece is used for connecting the other one of the connecting driving device and the driven piece and comprises a jogged convex piece, an elastic resetting piece and a rotating body which is coaxial with the circular groove, and the rotating body is accommodated in the circular groove and can rotate relative to the first rotating piece; the embedded convex part is provided with a convex part matched with the embedded groove; the rotating body is provided with a slideway for the embedded convex part to slide; the elastic resetting piece is positioned in the slide way and pushes out the embedded convex piece so that the convex part is embedded into the embedded groove; after the protruding part is embedded into the embedding groove, when the torsion between the first rotating piece and the second rotating piece is larger than the embedding force between the protruding part and the embedding groove, the embedding protruding part compresses the elastic resetting piece so that the protruding part is separated from the embedding groove.

2. The over-torque protection transmission mechanism according to claim 1, wherein: the outlet of the slideway is provided with a limiting convex part, and the limiting convex part forms a limiting channel which only can be used for the protruding part to extend out.

3. The over-torque protection transmission mechanism according to claim 1 or 2, wherein: the rotating body comprises a rotating upper cover and a rotating lower cover which is matched with the rotating upper cover and is fixedly covered; the opposite surfaces of the rotary upper cover and the rotary lower cover are provided with grooves; after the rotary upper cover and the rotary lower cover are closed and fixed, the two grooves are combined to form the slideway.

4. The over-torque protection transmission mechanism according to claim 1, wherein: the projection of the embedding groove on the vertical plane of the rotating axis is preferably arc-shaped or semicircular.

5. The over-torque protection transmission mechanism according to claim 4, wherein: the embedding groove is a hemispherical groove; the convex part is a hemisphere matched with the embedded groove.

6. The over-torque protection transmission mechanism according to claim 1, wherein: the rotating body and the first rotating piece are both provided with openings for the water supply and feeding pipeline to pass through.

7. Drive mechanism comprising an over-torque protection transmission according to any of claims 1 to 7, further comprising:

the driving device is connected with the first rotating piece and drives the first rotating piece to rotate, or is connected with the rotating body and drives the rotating body to rotate;

and the fixed support is used for fixing the driving device and is provided with a cavity for the first rotating piece and the second rotating piece to rotate.

8. The drive mechanism as recited in claim 7, wherein: the fixed support comprises a fixed support for fixing the driving device, a support upper cover fixed by the fixed support and a support lower cover matched with the support upper cover and fixed in a covering manner; the cavity is formed between the support upper cover and the support lower cover.

9. The drive mechanism as recited in claim 7, wherein the upper holder cover and the lower holder cover are removably secured by a snap-fit connection.

10. Electric kettle comprising a drive mechanism according to any one of claims 7 to 9, further comprising:

a kettle body;

a heating base having a kettle body heating part for heating the kettle body;

the water adding rotating arm comprises a water adding column arranged on the heating base and a rotating arm rotatably arranged at the upper end of the water adding column; the fixed support is fixed on the water adding column, and the rotation axis of the first rotating piece is coincided with the rotation axis of the rotating arm; one of the rotating main body and the first rotating piece which is not connected with the driving device is fixedly connected with the rotating arm;

the water adding pipeline extends into the rotary arm from the heating base through the water adding column and forms a water outlet at the tail end of the rotary arm;

and the control mainboard is respectively and electrically connected with the kettle body heating part, the driving device and the water adding pipeline.

11. The electric kettle of claim 10, wherein: the rotating main body or the first rotating piece is provided with an inserting part connected with the rotating arm; the rotating arm is provided with a plug hole for the plug part to be inserted and fixed; the fixed support is provided with an avoiding groove for the insertion part to pass through and rotate around the rotation axis of the rotating main body.

12. The electric kettle of claim 10, further comprising:

the in-place sensor is fixed on the water adding column at a position corresponding to the heating part of the kettle body; the in-place sensor is electrically connected with the control main board;

the trigger structure is arranged on the rotating arm and used for triggering the in-place sensor; when the water filling port is positioned above the heating part of the kettle body, the in-place sensor is triggered by the trigger structure.

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